18113717 has 4 divisors (see below), whose sum is σ = 18199776. Its totient is φ = 18027660.

The previous prime is 18113699. The next prime is 18113737. The reversal of 18113717 is 71731181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18113717 - 2¹⁶ = 18048181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18113717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42713 + ... + 43134.

It is an arithmetic number, because the mean of its divisors is an integer number (4549944).

Almost surely, 2^18113717 is an apocalyptic number.

It is an amenable number.

18113717 is a deficient number, since it is larger than the sum of its proper divisors (86059).

18113717 is an equidigital number, since it uses as much as digits as its factorization.

18113717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86058.

The product of its digits is 1176, while the sum is 29.

The square root of 18113717 is about 4256.0212640446. The cubic root of 18113717 is about 262.6248754304.

Adding to 18113717 its reverse (71731181), we get a palindrome (89844898).

The spelling of 18113717 in words is "eighteen million, one hundred thirteen thousand, seven hundred seventeen".